Onboard Generator System Upgrade

Key Features

System consists of a Generator Power Unit (GPU) and a belt driven industrial grade generator capable of supplying 80W continuous power during cruise.

Generator Power Unit is designed to provide onboard dual voltage regulated power supply of 6 and 12 Volts. Despite small size, power unit offers outstanding efficiency as well as unique features such as the ability to monitor load, battery current, engine rpm, generator and battery voltage through serial communication- as result all power distribution parameters can be transmitted to the ground station and monitored during the flight.

Integrated Lithium Polymer charger is used for the backup battery, which is switched on during the pre-flight checks, power peaks or in the event of the engine failure.

Power unit is packed in a sealed aluminum enclosure and fitted with the high-end industrial push-pull connectors.

Ready to run onboard generator system

80 W continuous load

6V and 12V output

Short circuit protection

3 cell Lithium Polymer integrated charger

External power connection

Integrated current sensors

TTL serial output

Product Specification

Engine Specifications:

PARAMETER

VALUE

Engine model

3W 28i or 28 CS, two stroke

Power

3.35 hp (28i) or 3.55 hp (28 CS)

Capacity

28 cc

Speed range

1500-8500 rpm

Oil / Gasoline Ratio

1:50 / 2% mix

Recommended 2-bladed Propellers

16x10, 18x8, 18x10, 20x8

Recommended 3-bladed Propellers

16x8, 16x10

Engine weight ( including ignition)

1.2 kg

Muffler

Not included

Electrical Specifications:

PARAMETER

VALUE

Generator type

Brushed

Generator voltage range

13 – 50 VDC

External power supply voltage range

13 – 50 VDC

Battery Type

3 cells Li-Polymer (not included)

Battery Voltage

12.6 V

Maximum battery charging current

2 A

Maximum continuous generator current

3.5 A

Maximum continuous battery current

8 A

Maximum continuous external power current

8 A

Output voltage

6 V and 12 V

Maximum output voltage ripple

50 mV @6V 50 mV@12V

Continuous load current, 6 Volt output 1,2

5 A

Continuous load current, 12 Volt output 1,2

5 A

Maximum GPU efficiency

90 %

Maximum total generator system efficiency

75 %

Maximum peak load current

10 A for 10 seconds

No load GPU current

110 mA

Tachometer range

1000-9000 rpm

Tachometer accuracy

200 rpm

Current sensor range

0 to 10 A

Current sensor accuracy

0.2 A

Voltage sensor accuracy

0.1 V

Serial Communication

5V TTL

Generator System Mechanical Specifications:

PARAMETER

VALUE

GPU Dimensions

59.4 x 115.8 x 32.4 mm

GPU Weight

~190 grams

Complete Onboard Generator System weight

~500 grams

Maximum GPU enclosure temperature

70°C

Environmental protection

IP 64 standard, IP 68 on request

Operating temperature

- 40°C to +50°C 2

Electrical connectors

Fischer 104 Series push-pull connector

1Generator continuous current must not exceed 3.5 A2Enclosure temperature must not exceed 70 °C , additional cooling may be required